Change of version nomenclature

[damiencarol]

We will change the way that tags are build starting with version 1.0.3.

We will follow the well knowned semantic versionning:

Given a version number MAJOR.MINOR.PATCH, increment the:

MAJOR version when you make incompatible API changes,
MINOR version when you add functionality in a backwards-compatible manner, and
PATCH version when you make backwards-compatible bug fixes.

Additional labels for pre-release and build metadata are available as extensions to the MAJOR.MINOR.PATCH format.

=> http://semver.org/

[damiencarol]

done.